In a May 12 attack two people drove to San Francisco to look at a used car. They tried to find the address the "seller" gave them, but couldn't. That's when two men wearing Halloween masks and armed with semiautomatic handguns robbed them of their cash and cell phones.

A similar incident happened on May 25 in the Portola district.

In both incidents at least one of the robbers was wearing a "Scream" mask.